“How Do Satelites Always Stay in the Same Place in the Sky?” – In fact not all satellites do – only the ones called geosynchronous.
In a Nutshell : Horsepower is a term that describes how much work an engine or other source does over a specific period of time.
Why Can’t We Invent a Time Machine? – Well, theoretically it IS possible to travel in time – but only forward, not backward in time.
Anything that is transparent allows light rays to get through the thicket of atoms packed within it more or less unscathed. The reason light can make it through substances like glass is that their molecules only mop up light of wavelengths shorter than those of visible light.
Why Does Water Freeze?
In a Nutshell … Water freezes because water molecules stick to one another when they get cold and slow down.
Why, in an atom, does the negatively charged electron not collapse into the positively charged nucleus?
If the nucleus of an atom is positively charged then why doesn’t the negatively charged electron collapse into it? To answer this we’re going to have to delve into the history of how our understanding of the atomic world has evolved, because the very nature of this question is based on a very old view of the atom. In the Beginning … When Ernest Rutherford, the New Zealand-born founder of nuclear physics, first...
How have our ideas about atoms changed over the years? In this article we look at how our atomic models have developed over time. It is entirely probable that we aren’t there yet and our understanding of the strange world, that is the realm of sub-atomic particle, will change again at some time in the future. Although our article starts in the 1800s, the idea of atoms was around long before that. It is in Ancient Greece that we...
Why Do Light Bulbs Light Up? The answer to this one is in fact changing … In this article we look at BOTH Incandescent and LED Light bulbs.
In a physics lab at the University of Oxford there is a battery that has been powering a metal ball ringing two bells for a staggering 175 years and nobody knows why.
To have to be forced to even think about debunking this question is something of a sad indictment of our current zeitgeist. That said, the Moon Landing conspiracy, is one of those theories that seems to persist – so we’ll give it our best shot to explain the most pertinent objections that are often quoted as ‘proof’ that it was all fake, and nothing more than an attempt to humiliate the Russians and hoodwink the world in the cause of American glory.
How Can Flies Fly at Speed into a Pane of Glass and Seemingly Remain Uninjured ?
The answer lies in a basic physics equation – one we would all have learned at school – and in the fact that the anatomy of a fly is rather springy.
There is something undeniably odd about a yacht doing 25 knots while sailing into a 15 knot wind. So, how is it that a yacht can travel faster than the wind ?
This is one of those urban myths that refuses to die. The idea that glass is really a viscous liquid, so thick that it takes centuries for it to flow. But what is the truth ?
They say that “a watched pot never boils”, but next time you’re in the kitchen waiting for the kettle to boil for a fresh brew take a moment to listen, rather than watch, to what happens just before your kettle reaches boiling point. A short period where it actually gets quieter – so what’s going on here then ?
The idea that all war is forever over and that swords will be put to a more peaceful use is appealing, but seemingly ever beyond our grasp. The literal forging of weapons into a better purpose seems far fetched, so it will surprise you to know that today we literally are doing this! Medical Scanners are being made from old WW2 and pre-WW2 Battleships. But why ?